The availability of prey and the ability to adapt to changing environments played key roles in the evolution of sharks. A new study, where 3,000 shark teeth were analyzed, provides new insight into ...

Before humans and early primates, before dinosaurs, and even before trees, there were sharks. Sharks have been around for more than 400 million years (although how long exactly remains contested).

The availability of prey and the ability to adapt to changing environments played key roles in the evolution of sharks. A new study, in which over 3,000 shark teeth were analysed, provides new insight ...